When I first started, the store wasn't in the best part of town so I kept a gun on my side. It was covered so customers couldn't see it. One day I'm making a delivery to my biggest customer. They package DVDs, game discs and the like, so you have to go through security (someone with a hand wand) on your way out. It wasn't until after I dropped of the signs at my customers office and I'm walking up to security that I remember that I have the gun on me. I walk up to the guard and say that I forgot to take off my gun before I came in and it is on my belt. She asks me to repeat myself but then goes through the motions of wanding me out. She kept the wand about 18" from the gun and it did not alert.
The funny rest of the story is they had ordered "No Guns on Premises" signs the week before but they hadn't put them up yet.
I haven't carried in 5 years, but I was thinking about doing so again.